... :WBP,Melamine,MR,Eo,E1 4Grade:First-Class Poplar wooden boards for doors frame1)material: poplar,pine2)thick: 6-100mm3)size : length up ... ,construction, packing8)certification: ISO9001,CE,CARB9)features: 1.high bending strength2.little linear expansion conefficient3.strong nail holding4. ... moistureproof and easy work5.tight construction and high strength6.no ratten and decay7.low formaldehyde emission